Side wall cavity detection device and detection method for storage tank

Abstract

A side wall cavity (105) detection device and detection method for a storage tank, relating to the technical field of measurement devices. A tank cover of a storage tank is provided with a plurality of pipes (102), and each pipe (102) is in communication with the side wall cavity (105). The side wall cavity (105) detection device comprises: a support main body (20), comprising a telescopic member and a driving member (205), wherein the telescopic member is capable of passing through each pipe (102) to extend into the side wall cavity (105), and the driving member (205) is used for driving the telescopic member to extend / retract; a detection system (30), at least comprising a material detector (304) and a processor (301), wherein the material detector (304) is used for acquiring distribution state information of a filler material in the side wall cavity (105), and the processor (301) receives and processes the distribution state information of the filler material; and a display system (40), used for displaying the distribution state information of the filler material processed by the processor (301). By means of the side wall cavity (105) detection device, visualized, full-angle, three-dimensional imaging scan detection results for the side wall cavity (105) of an inspected storage tank can be efficiently and accurately obtained, meeting the requirements for high-precision and high-efficiency detection of filling state change of the filler material in the side wall cavity (105) of the storage tank.

Description

Device and method for detecting the inner cavity of the side wall of the storage tank Technical Field

[0001] This application belongs to the field of measuring device technology, and in particular relates to a detection device and method for detecting the inner cavity of the side wall of a storage tank. Background Technology

[0002] Currently, some storage tanks used for transporting flammable media (such as LNG) are usually huge cylindrical structures. The side walls of the cylinder are hollow walls formed by inner and outer cylinder walls. The top of the storage tank is closed by a dome made of steel plates, steel bars and concrete. Multiple filling tubes corresponding to the hollow cavities of the side walls are arranged on the dome. The filling tubes can be used to fill the hollow cavities of the side walls with insulation materials, such as perlite particles. The top of the filling tubes is sealed with flanges.

[0003] However, due to factors such as pressure and liquid level fluctuations within the storage tank, cold contraction and deformation of the inner tank, vibrations caused by the start-up and shutdown of equipment inside the tank, unloading, and the breakage of some perlite particles, uneven settlement of perlite in the inner cavity of the tank sidewall can occur. This can affect the thermal insulation effect of the tank sidewall, resulting in the so-called tank cold leakage problem. The visible symptoms include uneven condensation on the outside of the tank sidewall, growth of moss in some areas, increased evaporation of BOG (gas-state natural gas), increased BOG temperature on the outlet pipeline, and abnormal temperature at some internal measuring points.

[0004] Currently, the assessment of tank leakage problems relies on post-event methods, lacking precise and reliable detection tools and regular inspection and prediction standards. Existing methods such as infrared thermal imaging, manual measurement, or simple instrument measurements can only reflect local data on changes in perlite filling status. They cannot accurately reflect the overall shape and trend of changes in the tank sidewall cavity, as well as the changes in perlite filling status. Consequently, it is impossible to accurately grasp the trend of changes in the tank sidewall cavity and accurately estimate the amount of perlite to be replenished.

[0005] Because LNG storage tanks have small-diameter and numerous filling pipes, and the inner cavity of the tank side wall is a large-diameter annular space without a light source, the inspection of the inner cavity of the LNG storage tank side wall is extremely difficult and cannot be achieved by general inspection equipment or devices in the existing technology.

[0006] Summary of the Invention

[0007] To address the aforementioned technical problems in the existing technology, this application provides a detection device and method for detecting the inner cavity of the side wall of a storage tank. This detection device can efficiently and accurately obtain the scanning detection results of the inner cavity of the side wall of the inspected storage tank through visualization, full-angle, and three-dimensional imaging, meeting the high-precision and high-efficiency detection needs for the inner cavity state of the side wall and changes in the filling state of the storage tank during operation.

[0008] The technical solution adopted in the embodiments of this application is:

[0009] A sidewall cavity detection device for a storage tank, wherein the tank lid has multiple pipes, each pipe communicating with the sidewall cavity, and the sidewall cavity detection device includes:

[0010] The support body includes a telescopic component and a driving component. The telescopic component can pass through each of the pipes to extend into the inner cavity of the side wall. The driving component is kinetically connected to the telescopic component and is used to drive the telescopic component to extend or retract so that the head of the telescopic component approaches or moves away from the filler located in the inner cavity of the side wall.

[0011] The detection system includes at least a material detector and a processor. The material detector is located at the head end of the telescopic member to acquire information on the distribution of the filler material in the inner cavity of the side wall. The processor receives and processes the information on the distribution of the filler material.

[0012] A display system, connected to the processor, is used to receive and display the distribution status information of the filler material after processing by the processor.

[0013] Furthermore, the telescopic component includes a plurality of sleeves that are slidably connected in sequence;

[0014] The plurality of the cannulas include a tail tube at a first end and a head tube at a second end;

[0015] The tail section is detachably connected to the pipe;

[0016] The head tube forms the head of the telescopic component, and the material detector is disposed on the head tube.

[0017] Furthermore, the pipe has a flange;

[0018] The support body also includes a pipe end clamp connected to the tail pipe body. The pipe end clamp is provided with at least two sets of clamps for clamping the flange to fix the pipe end clamp to the flange.

[0019] Furthermore, the nozzle clamp includes an outer retaining ring, an inner retaining ring, and a fixing frame connecting the outer retaining ring and the inner retaining ring;

[0020] The inner retaining ring is connected to the tail tube body, and the outer retaining ring abuts against the flange.

[0021] At least two sets of clamps are provided on the fixed frame.

[0022] Furthermore, the head tube is provided with a detector frame, which includes a first frame, a second frame, a first drive mechanism, and a second drive mechanism;

[0023] The first drive mechanism connects the first frame and the head tube, and is used to drive the first frame to rotate relative to the head tube around the first axis.

[0024] The second drive mechanism connects the second frame to the first frame and is used to drive the second frame to rotate relative to the first frame around the second axis.

[0025] The material detector is mounted on the second frame.

[0026] The first axis is perpendicular to the second axis.

[0027] Furthermore, the detection system also includes a gyroscope, which is mounted on the telescopic member and close to the detector frame, for detecting the attitude of the telescopic member;

[0028] The processor is connected to the gyroscope, the first drive mechanism, and the second drive mechanism, respectively.

[0029] Furthermore, the detection system also includes a position locator, which is disposed on the support body to obtain the position information of the pipe, the position information of the pipe at least characterizing the position of the pipe through which the telescopic member passes.

[0030] Furthermore, the sidewall cavity detection device also includes a charging system, which includes a battery and a solar panel;

[0031] The batteries provide power to the drive unit, the detection system, and the display system, respectively.

[0032] The solar panel is used to convert sunlight into electrical energy to charge the battery.

[0033] And / or, the sidewall cavity detection device further includes a manual controller;

[0034] The manual controller is electrically connected to the drive unit, the detection system, and the display system, respectively.

[0035] Furthermore, the material detector is at least one of an ultrasonic detector, a radio detector, or a laser detector.

[0036] A method for detecting the inner cavity of the side wall of a storage tank, the method comprising:

[0037] The expansion joints are passed through each pipe and inserted into the inner cavity of the side wall of the storage tank;

[0038] Control the telescopic component to extend or retract so that the head of the telescopic component approaches the material inside the side wall cavity of the storage tank;

[0039] The distribution image of the filling material inside the side wall cavity is obtained by using a material detector;

[0040] The processor stitches together the distribution images of the filler material corresponding to each pipe to obtain a three-dimensional visualization of the filler material structure in the entire sidewall cavity.

[0041] The three-dimensional visualization structure diagram is presented through a display system.

[0042] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows:

[0043] The telescopic component of the supporting main body in the side wall cavity detection device of this application can extend through each pipe into the side wall cavity. The material detector on it detects the distribution of the filling material and displays it through the display system. This detection device can overcome the problems of small inlet diameter, many measuring points, and large-diameter annular bend in the side wall cavity of the storage tank, which cause small detour space and difficult detection. By processing the distribution information of the filling material measured by each pipe through the processor, the device can efficiently and accurately obtain the scanning detection results of the side wall cavity of the inspected storage tank with visualization, full angle, and three-dimensional imaging. This meets the high-precision and high-efficiency detection needs of the side wall cavity status and filling material filling status changes during the operation of the storage tank.

[0044] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0045] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings illustrate various embodiments generally by way of example rather than limitation, and are used, together with the description and claims, to explain the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0046] Figure 1 is a three-dimensional structural diagram of a storage tank in the related technology;

[0047] Figure 2 is a three-dimensional structural diagram of a partially cut-off storage tank in the related technology;

[0048] Figure 3 is a schematic diagram of the structure of the side wall cavity detection device of the storage tank according to an embodiment of this application;

[0049] Figure 4 is a three-dimensional structural diagram of the supporting body according to an embodiment of this application;

[0050] Figure 5 is a schematic diagram of the location structure of the detection system according to an embodiment of this application;

[0051] Figure 6 is a three-dimensional structural diagram of the nozzle clamp according to an embodiment of this application;

[0052] Figure 7 is a schematic diagram of the first working state of the detection system in the side wall cavity detection device of this application when it probes downward;

[0053] Figure 8 is a schematic diagram of the second working state of the detection system in the side wall cavity detection device of this application when it is probing downwards;

[0054] Figure 9 is a flowchart of the method for detecting the inner cavity of the side wall of the storage tank according to an embodiment of this application.

[0055] In the picture:

[0056] 10. LNG tank body; 100. Shell; 101. Dome; 102. Pipe; 103. Outer shell wall; 104. Inner shell wall; 105. Side wall cavity; 106. Perlite; 107. Flange;

[0057] 20. Support body; 200. Tail tube; 201. Middle tube; 202. Head tube; 203. Detector frame; 2030. First frame; 2031. Second frame; 204. Tube opening clamp; 2041. Outer clasp; 2042. Inner clasp; 2043. Slide rail; 2044. Slider; 205. Driving component;

[0058] 30. Detection system; 301. Processor; 302. Positioner; 303. Gyroscope; 304. Material detector;

[0059] 40. Display system;

[0060] 50. Solar panels;

[0061] 60. Chassis;

[0062] 70. Storage battery;

[0063] 80. Manual controller;

[0064] 90. Cables. Detailed Implementation

[0065] To enable those skilled in the art to better understand the technical solutions of the embodiments of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0067] Figure 1 is a three-dimensional structural diagram of a storage tank in the related art, and Figure 2 is a three-dimensional structural diagram of a partially cut-off storage tank in the related art.

[0068] As shown in Figure 1, the storage tank involved in this embodiment is an LNG storage tank 10. The LNG storage tank 10 is a cylindrical structure. The side wall of the cylindrical structure 100 is a hollow side wall cavity 105 formed by the inner cylinder wall 104 and the outer cylinder wall 103. The top of the cylindrical structure 100 is closed by a dome 101. The top of the dome 101 is also surrounded by pipes 102 corresponding to the hollow side wall cavity 105. The pipes 102 are used to fill the side wall cavity 105 with perlite 106, and the top of the filling pipe is closed by a flange.

[0069] As shown in Figures 3 and 5, this application embodiment provides a side wall cavity detection device for a storage tank. The side wall cavity detection device includes a support body 20, a detection system 30, and a display system 40.

[0070] The support body 20 includes a telescopic member and a drive member 205. The telescopic member can pass through each pipe 102 to extend into the inner cavity 105 of the side wall of the storage tank and can extend and retract within the inner cavity 105 of the side wall.

[0071] The driving component 205 is connected to the telescopic component in a transmission manner. The driving component 205 is used to drive the telescopic component to extend and retract within the inner cavity 105 of the side wall. When the telescopic component extends downward, the head of the telescopic component approaches the perlite 106 located at the bottom of the inner cavity 105 of the side wall. When the telescopic component retracts upward, the head of the telescopic component moves away from the perlite 106 at the bottom of the inner cavity 105 of the side wall.

[0072] The detection system 30 includes at least a material detector 304 and a processor 301. The material detector 304 is located at the head end of the telescopic member to obtain information on the distribution status of perlite 106 in the inner cavity 105 of the side wall. The processor 301 is used to receive and process the information on the distribution status of perlite 106.

[0073] The display system 40 is connected to the processor 301 and is used to receive and display the distribution status information of the perlite 106 after processing by the processor 301.

[0074] In this embodiment, the telescopic component of the supporting body 20 of the side wall cavity detection device can extend through each pipe 102 into the side wall cavity 105. The material detector 30 on it detects the distribution of the filling material and displays it through the display system 40. This detection device can overcome the problems of small inlet diameter, many measuring points, and large-diameter annular bend inside the side wall cavity 105 of the storage tank, which cause the detection system 30 to have limited space and difficult detection. By processing the distribution information of the filling material measured by each pipe 102 through the processor 301, the detection results of the side wall cavity 105 of the inspected storage tank can be obtained efficiently and accurately with visualization, full angle, and three-dimensional imaging. This meets the high-precision and high-efficiency detection needs of the state of the side wall cavity 105 and the changes in the filling state of the filling material during the operation of the storage tank.

[0075] As shown in Figure 4, in some embodiments, the telescopic component is a telescopic tube, which includes multiple sleeves that are slidably connected in sequence.

[0076] The multiple sleeves include a tail tube 200, a head tube 202, and multiple intermediate tubes 201 connecting the tail tube 200 and the head tube 202. Along the telescopic direction of the telescopic tube, the diameters of the tail tube 200, intermediate tubes 201, and head tube 202 gradually decrease.

[0077] The head tube 202 forms the head of the telescopic component, and the material detector 304 is mounted on the head tube 202. When the telescopic tube extends downwards, the head tube 202 gradually approaches the perlite 106 at the bottom of the inner cavity 105 of the side wall. The material detector 304 can detect the distribution of the perlite 106.

[0078] The telescopic tube, composed of multiple sections of tubing with different outer diameters that can be fitted together, makes inspection easier and faster, allowing it to enter the inner cavity 105 of the side wall of the storage tank.

[0079] In this embodiment, the portion of the head tube 202 or the middle tube 201 near the head tube 202 can be directly and detachably connected to the pipe 102, thereby ensuring that the telescopic tube can extend and retract within the side wall cavity 105 with sufficient length.

[0080] Preferably, the driving component 205 in this embodiment can be an electric push-pull rod, which is located inside the telescopic tube and enables the continuous extension and retraction of the telescopic tube.

[0081] The method of connecting and extending multiple sleeves with different outer diameters by means of an electric push-pull rod is obviously only one implementation method provided in this application. Of course, those skilled in the art can also use other methods in the prior art to connect and extend the sleeves, or even use manual methods to connect them in some special occasions or under special circumstances.

[0082] In some embodiments, the pipe 102 has a flange 107. The support body 20 also includes a pipe clamp 204 that connects to the tail section of the pipe 200.

[0083] The pipe clamp 204 is provided with at least two sets of clamps for clamping the flange 107, so as to fix the pipe clamp 204 on the flange 107.

[0084] As shown in Figure 6, in some embodiments, the nozzle clamp 204 includes an outer clamping ring 2041, an inner clamping ring 2042, and a fixing frame connecting the outer clamping ring 2041 and the inner clamping ring 2042.

[0085] The inner retaining ring 2042 is connected to the tail pipe body 200. The outer diameter of the inner retaining ring 2042 is smaller than the inner diameter of the pipe 102, and the inner diameter of the outer retaining ring 2041 is larger than the inner diameter of the pipe 102. The outer retaining ring 2041 abuts against the flange 107 of the pipe 102, and the flange 107 can support the entire pipe clamp 204.

[0086] In this embodiment, at least two sets of clamps are arranged around the inner retaining ring 2042. When the outer retaining ring 2041 abuts against the flange 107, the clamps can directly clamp onto the flange 107 to prevent the outer retaining ring 2041 from separating from the flange 107. This structure makes the pipe clamp 204 easier and more stable to install, thereby enabling the acquisition of more accurate and reliable detection data.

[0087] Preferably, the fixing frame in this embodiment may include multiple guide rails 2043 connecting the inner retaining ring 2042 and the outer retaining ring 2041. The multiple guide rails 2043 are arranged around the inner retaining ring 2042, and the extending direction of each guide rail 2043 is consistent with the radial direction of the outer retaining ring 2041. Each guide rail 2043 is provided with two sliders 2044. The two sliders 2044 can move closer to each other or move along the guide rail 2043. The two sliders 2044 form a set of clamps. When the outer retaining ring 2041 abuts against the flange 107, the flange 107 can be clamped by the two sliders 2044 moving closer to each other.

[0088] Of course, the above-mentioned pipe clamp 204 is only one implementation method provided by this application. Those skilled in the art can use other forms of pipe clamp 204 in the prior art to install and fix the LNG storage tank side wall cavity detection device based on the basic idea and method of this embodiment, so as to provide a good working platform for the side wall cavity detection device in this embodiment. These situations are of course still the rights to be protected by this application.

[0089] As shown in Figure 4, in some embodiments, the head tube 202 is provided with a detector frame 203 for fixing the material detector 304. The detector frame 203 includes a first frame 2030, a second frame 2031, a first drive mechanism (not shown in the figure), and a second drive mechanism (not shown in the figure).

[0090] The first drive mechanism connects the first frame 2030 and the head tube 202, and is used to drive the first frame 2030 to rotate relative to the head tube 202 around the first axis.

[0091] The second drive mechanism connects the second frame 2031 and the first frame 2030, and is used to drive the second frame 2031 to rotate relative to the first frame 2030 around the second axis.

[0092] Furthermore, the material detector 304 is mounted on the second frame 2031, with the first axis perpendicular to the second axis. The first axis can be aligned with the axis of the telescopic component.

[0093] Since the telescopic component may not remain vertical after being inserted into the inner cavity 105 of the side wall, rotating the first frame 2030 and the second frame 2031 can not only ensure that the material detector 304 is in a vertical position for material detection, but also enable the material detector 304 to rotate at multiple angles and in all directions, thereby helping the material detector 304 mounted on the second frame 2031 to perform all-round scanning and detection of the inner cavity 105 of the side wall.

[0094] As shown in Figure 5, in some embodiments, the detection system 30 further includes a gyroscope 303, which is mounted on the telescopic member and positioned close to the detector frame 203 to detect the attitude of the telescopic member.

[0095] A gyroscope 303 is installed on the telescopic component, which can be used to determine and provide feedback on the status information of each telescopic component after it extends into the inner cavity 105 of the side wall, so as to ensure the consistency and accuracy of the original state of the material detector 304 when scanning and detecting the perlite 106 in the inner cavity 105 of the side wall of the storage tank.

[0096] Preferably, in this embodiment, the processor 301 is connected to the gyroscope 303, the first drive mechanism, and the second drive mechanism.

[0097] The gyroscope 303 is used to detect the attitude of the telescopic component and send the detected attitude information to the processor 301. The processor 301 then controls the first frame 2030 to rotate through the first drive mechanism and the second frame 2031 to rotate through the second drive mechanism, so as to adjust the attitude of the telescopic component at any time, as shown in Figures 7 and 8.

[0098] As for the first and second drive mechanisms in this embodiment, conventional gear mechanisms can be selected, and the gear set can be driven to rotate through the servo electrodes in the gear mechanism.

[0099] Continuing with Figure 5, in some embodiments, the detection system 30 further includes a position locator 302, which is disposed on the telescopic member to obtain the position information of the pipe 102. The position information of the pipe 102 at least indicates the position of the pipe 102 through which the telescopic member passes.

[0100] The position locator 302 installed on the telescopic component can receive satellite positioning information to determine the current position coordinates of the telescopic component on the can lid. This allows the material detector 304 to detect the distribution data of perlite 10 in the inner cavity 105 of the side wall of the storage tank at the current position, which can be clearly calibrated and recorded. This lays the foundation for the subsequent splicing of data from various points to obtain the complete distribution of perlite 10 in the inner cavity 105 of the side wall of the inspected storage tank.

[0101] As shown in Figure 3, in some embodiments, the sidewall cavity detection device further includes a charging system, which includes a battery 70 and a solar panel 50.

[0102] The battery 70, solar panel 50 and processor 301 are respectively mounted on a chassis 60. The battery 70 is electrically connected to the drive unit 205, the detection system 30 and the processor 301 to supply power to these devices.

[0103] The solar panel 50 is used to convert sunlight into electrical energy to charge the battery 70. After the solar panel 50 is installed on the chassis 60, solar energy can be fully utilized to charge the battery 70, which not only saves energy, but also makes it convenient to carry and use, and ensures the electrical safety of the side wall cavity detection device in this embodiment and the normal completion of the detection.

[0104] Preferably, in this embodiment, the solar panel 50 is rotatably mounted on the housing 60, thereby adjusting the tilt angle of the solar panel at any time to better receive sunlight.

[0105] Alternatively, the display system 40 may be a touch screen, which can transmit control commands to the processor 301 for controlling the driver 205 and the detection system 30.

[0106] In some embodiments, the sidewall cavity 105 detection device further includes a manual controller 80, which is electrically connected to the drive unit 205, the detection system 30 and the display system 40 respectively.

[0107] The manual controller 80 is a redundant design of the display system 40. It is used for manual operation when the display system 40 fails and cannot automatically control the drive unit 205 and / or the detection system 30 by inputting commands, or to shut down the drive unit 205 and / or the detection system 30 in an emergency.

[0108] As a redundant design of the display system 40, the addition of a manual controller 80 can further improve the safety and reliability of the detection device, thereby ensuring the safety of the intramural cavity detection device and the smooth progress of the detection.

[0109] In some embodiments, the material detector 304 disposed on the telescopic member can be at least one of an ultrasonic detector, a radio detector, or a laser detector. These detectors can better overcome the problems of numerous measuring points, lack of light source, and large-diameter annular curvature inside the side wall cavity 105 of the storage tank, which result in a small detour space for the detection system 30 and difficulties in detection, and obtain real, complete, and visualized detection data on the environment of the side wall cavity 105 of the storage tank and the filling status of the perlite 106 inside the cavity.

[0110] Example 2:

[0111] As shown in Figure 9, this application embodiment also provides a method for detecting the inner cavity of the side wall of a storage tank. This method, which uses the detection device for the inner cavity of the side wall as described in Embodiment 1, mainly includes the following steps:

[0112] Step S100: Pass the telescopic component through each pipe 102 and extend it into the inner cavity 105 of the side wall of the storage tank;

[0113] Before proceeding to step S100, the operator needs to use a wrench to open the flanged and circumferentially sealed pipe 102 around the dome 101 of the storage tank under inspection. Then, the expansion joints are inserted one by one through the pipe 102 into the inner cavity 105 of the side wall.

[0114] Step S100 further includes: after passing the telescopic component through the first pipe 102 and fixing it, connecting the drive component 205 and the detection system 30 on the telescopic component with the externally placed display system 40 using a cable 90 to transmit information.

[0115] It should be noted that the processor 301 in the display system 40 and the detection system 30 can be integrated into a chassis 60 outside the tank. The chassis 60 can also be equipped with a solar panel 50 and a battery 70. The battery 70 is electrically connected to the drive unit 205, the detection system 30 and the processor 301 respectively to power these devices. The solar panel 50 is used to convert sunlight into electrical energy to charge the battery 70.

[0116] Step S200: Control the telescopic component to extend or retract so that the head of the telescopic component approaches the material inside the side wall cavity 105 of the storage tank;

[0117] Specifically, in step 200, the processor 301 controls the telescopic member to extend so that the head of the telescopic member reaches above the material already filled in the inner cavity 105 of the side wall.

[0118] Furthermore, the position and orientation of the telescopic components and the detection system 30 are adjusted and confirmed one by one to ensure that the material detector 304 can conduct detection on the hollow side wall cavity 105 of its area.

[0119] In step 200, after the telescopic component extends through the first pipe 102 on the dome 101 into the inner cavity 105 of the side wall, and the telescopic component has completed the detection of the material filling status of its area, the telescopic component is controlled to retract and then reinsert into the second pipe 102 for a new detection. This process is repeated multiple times until the material filling status of the inner cavity 105 of the side wall of all the LNG storage tanks 10 under inspection corresponding to all pipes 102 has been detected.

[0120] In step 200, the following is also included: during the gradual unfolding and elongation of the telescopic member, the material detector 304 on it works simultaneously. When the material detector 304 detects an obstacle in front of it, it sends an alarm to the processor 301. After receiving the alarm, the processor 301 immediately issues an instruction to stop the telescopic member from elongating.

[0121] Step 200 further includes: after the telescopic component extends to a specified length, the gyroscope 303 on the telescopic component detects the posture of the telescopic component to determine whether the material detector 304 is in a vertical state. If the longitudinal tilt angle of the material detector 304 exceeds a preset angle, such as a preset angle of 0.5°, the processor 301 controls the detector frame 203 to move until the material detector 304 is in a vertical position, and then the material detector 304 uses the adjusted vertical position as its starting longitudinal coordinate for detection.

[0122] Step S300: Obtain an image of the distribution of the filling material in the inner cavity 105 of the side wall using the material detector 304;

[0123] Specifically, in step 300, the processor 301 sends a scanning and detection command to the material detector 304 to scan and detect the surrounding environment of the inner cavity 105 of the side wall of the inspected LNG storage tank 10 in each area where the telescopic component is located, and sends the information obtained from each detection to the processor 301.

[0124] Step S400: The processor 301 stitches together the distribution images of the filling material corresponding to each pipe 102 to obtain a three-dimensional visualization structure diagram of the filling material in the entire sidewall cavity 105.

[0125] Specifically, in step 400, the processor 301 stitches together the distribution images of the filling material in the inner cavity 105 of the side wall of the inspected LNG storage tank 10 corresponding to each pipe 102 obtained by the expansion joint detection, and performs noise reduction and other processing to obtain a three-dimensional visualization digital model structure diagram of the filling material in the inner cavity 105 of the entire side wall of the inspected LNG storage tank 10.

[0126] Step S500: Present the three-dimensional visualization structure diagram through the display system 40.

[0127] In step S500, the display system 40 displays the processed three-dimensional visualized digital model structure diagram and stores and records relevant information.

[0128] The sidewall cavity detection method of this embodiment can achieve accurate and effective control and estimation of the perlite replenishment in the sidewall cavity of LNG storage tanks. It can not only effectively improve work efficiency, but also reduce material waste, eliminate the hidden danger of cold leakage in the storage tank, and ensure the safe operation of LNG storage tanks.

[0129] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A device for detecting the inner cavity of the side wall of a storage tank, wherein the tank cover has multiple pipes, each pipe communicating with the inner cavity of the side wall, characterized in that, The sidewall cavity detection device includes: The support body includes a telescopic component and a driving component. The telescopic component can pass through each of the pipes to extend into the inner cavity of the side wall. The driving component is kinetically connected to the telescopic component and is used to drive the telescopic component to extend or retract so that the head of the telescopic component approaches or moves away from the filler located in the inner cavity of the side wall. The detection system includes at least a material detector and a processor. The material detector is located at the head end of the telescopic member to acquire information on the distribution of the filler material in the inner cavity of the side wall. The processor receives and processes the information on the distribution of the filler material. A display system, connected to the processor, is used to receive and display the distribution status information of the filler material after processing by the processor.

2. The side wall cavity detection device for the storage tank as described in claim 1, characterized in that, The telescopic component includes multiple sleeves that are slidably connected in sequence. The plurality of the cannulas include a tail tube at a first end and a head tube at a second end; The tail section is detachably connected to the pipe; The head tube forms the head of the telescopic component, and the material detector is disposed on the head tube.

3. The side wall cavity detection device for the storage tank as described in claim 2, characterized in that, The pipe has a flange; The support body also includes a pipe end clamp connected to the tail pipe body. The pipe end clamp is provided with at least two sets of clamps for clamping the flange to fix the pipe end clamp to the flange.

4. The side wall cavity detection device for the storage tank as described in claim 3, characterized in that, The pipe fitting includes an outer retaining ring, an inner retaining ring, and a fixing frame connecting the outer retaining ring and the inner retaining ring; The inner retaining ring is connected to the tail tube body, and the outer retaining ring abuts against the flange. At least two sets of clamps are provided on the fixed frame.

5. The side wall cavity detection device for the storage tank as described in claim 2, characterized in that, The head tube is provided with a detector frame, which includes a first frame, a second frame, a first drive mechanism, and a second drive mechanism. The first drive mechanism connects the first frame and the head tube, and is used to drive the first frame to rotate relative to the head tube around the first axis. The second drive mechanism connects the second frame to the first frame and is used to drive the second frame to rotate relative to the first frame around the second axis. The material detector is mounted on the second frame. The first axis is perpendicular to the second axis.

6. The side wall cavity detection device for the storage tank as described in claim 5, characterized in that, The detection system also includes a gyroscope, which is mounted on the telescopic member and close to the detector frame, for detecting the attitude of the telescopic member; The processor is connected to the gyroscope, the first drive mechanism, and the second drive mechanism, respectively.

7. The side wall cavity detection device for the storage tank as described in claim 2, characterized in that, The detection system also includes a position locator, which is disposed on the support body to obtain the position information of the pipe. The position information of the pipe at least indicates the position of the pipe through which the telescopic member passes.

8. The side wall cavity detection device for the storage tank as described in claim 2, characterized in that, The sidewall cavity detection device also includes a charging system, which includes a battery and a solar panel. The batteries provide power to the drive unit, the detection system, and the display system, respectively. The solar panel is used to convert sunlight into electrical energy to charge the battery. And / or, the sidewall cavity detection device further includes a manual controller; The manual controller is electrically connected to the drive unit, the detection system, and the display system, respectively.

9. The side wall cavity detection device for the storage tank as described in claim 1, characterized in that, The material detector is at least one of an ultrasonic detector, a radio detector, or a laser detector.

10. A method for detecting the inner cavity of the side wall of a storage tank, characterized in that, include: The expansion joints are passed through each pipe and inserted into the inner cavity of the side wall of the storage tank; Control the telescopic component to extend or retract so that the head of the telescopic component approaches the material inside the side wall cavity of the storage tank; The distribution image of the filling material inside the side wall cavity is obtained by using a material detector; The processor stitches together the distribution images of the filler material corresponding to each pipe to obtain a three-dimensional visualization of the filler material structure in the entire sidewall cavity. The three-dimensional visualization structure diagram is presented through a display system.

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